Heat isolation collar for paper cup

ABSTRACT

A paper cup assembly includes a paper cup  10  with a bottom piece connected to the lower end thereof and the cup has an open top. A lip portion made of bio-degradable plastic material is formed along the open top by way of injection molding, heat-pressing or high-frequency wave welding. Multiple protrusions are formed on the outside of the cup when forming the lip portion. The cup has a positioning portion and the isolation collar is mounted to the cup and the top portion of the isolation collar is connected to the positioning portion. The lower portion of the isolation collar is fixed to the cup. A gap is defined between the whole isolation collar and the cup. When used to a deep cup, the protrusions are helpful for isolating the heat from the cup.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a paper cup assembly, and moreparticularly, to a paper cup with heat isolation collar mounted thereto.

2. Background of the Invention

A conventional beverage cup for take-out generally is made by paperwhich cannot isolation temperature of the beverage so that the usercannot hold the cup because the high temperature transferred to theuser's hand. Besides, the beverage soon becomes cold for the same reasonand this affects the taste of the beverage. Taiwan Utility Patent No.M379573 discloses a paper cup as shown in FIG. 1 and includes a cup witha bottom piece connected to the underside of the cup, and an isolationpiece located on outside of the cup. The isolation piece has aconnection portion and an inner layer which folded downward from theconnection portion. A space is defined between the outside of the cupand the isolation piece. By the isolation piece, the structural strengthof the cup is reinforced and the space cuts off the heat transferring tothe user's hand.

It is noted that the conventional isolation piece is connected to thelower edge of the open top of the cup so that the top portion of theisolation piece is almost in contact with the cup. However, when usingthe beverage in the cup, the users usually hold the top portion of thecup so that the user can feel the high temperature at the top portion ofthe cup because there is no gap between the cup and the top portion ofthe isolation piece. Even if there is a gap, when the length of cup islong enough, the isolation piece cannot bear the pressure applied to theisolation piece from the user so that the user still contact the cup andfeel the temperature.

The present invention intends to provide a paper cup with an isolationcollar which improves the shortcomings of the conventional isolationpiece.

SUMMARY OF THE INVENTION

The present invention relates to a paper cup assembly and comprises apaper cup with a bottom piece connected to the lower end thereof and thecup has an open top. A lip portion made of bio-degradable plasticmaterial is formed along the open top by way of injection molding,heat-pressing or high-frequency wave welding. Multiple protrusions areformed on the outside of the cup when forming the lip portion. The cuphas a positioning portion and the isolation collar is mounted to the cupand the top portion of the isolation collar is connected to thepositioning portion. The lower portion of the isolation collar is foldedinward and fixed to the cup. A gap is defined between the wholeisolation collar and the cup. When used to a deep cup, the protrusionsare helpful for isolating the heat from the cup.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of the conventional paper cup;

FIG. 2 is a perspective view to show the paper cup assembly of thepresent invention;

FIG. 3 is an exploded view to show the paper cup assembly of the presentinvention;

FIG. 4 is a cross sectional view of the paper cup assembly of thepresent invention;

FIG. 5 is a cross sectional view to show another embodiment of the papercup assembly of the present invention, and

FIG. 6 shows that the paper cup assembly of the present invention has aplastic bottom piece.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 2 to 6, the paper cup assembly of the presentinvention comprises a paper cup 10 with a lip portion 20, and anisolation collar 30 which is mounted to the cup 10.

The cup 10 is made by rolling a piece of paper board and a bottom piece11 is connected to the lower end thereof and the cup 10 has an open top12. The lip portion 20 is formed along the open top 12.

The lip portion 20 is an annular portion and made of plastic materialformed along the open top 12 by way of injection molding, heat-pressingor high-frequency wave welding. The cup 10 has a positioning portion 21defined in the underside of the lip portion 20. Multiple protrusions 22are integrally formed on the outside of the cup 10 when forming the lipportion 20. The isolation collar 30 is mounted to the cup 10 and a topportion of the isolation collar 30 is connected to the positioningportion 21. The protrusions 22 are in contact with the isolation collar30 when a user holds the isolation collar 30.

The top portion of the isolation collar 30 is engaged with thepositioning portion 21 of the lip portion 20 by way of gluing orheat-welding. The lower portion of the isolation collar 30 is foldedinward and fixed to the outside of the cup 10 by way of gluing orheat-welding. Therefore, a gap 41 is defined between the outside of thecup 10 and the inside of the isolation collar 30. As shown in FIGS. 4and 5, when fixing the lower portion of the isolation collar 30 to thecup, because the top portion top portion of the isolation collar 30 isengaged with the positioning portion 21 of the lip portion 20, so thatthe lower portion of the isolation collar 30 is easily decided to beconnected to the position of the cup 10, either close to the lower endof the cup or in flush with the underside of the cup 10.

Furthermore, as shown in FIG. 6, the bottom piece 11 is made by plasticmaterial and integrally formed with the cup by way of injection molding,heat-pressing or high-frequency wave welding. The bottom piece 11 has apositioning groove 111 when the bottom piece 11 is made. The lowerportion of the isolation collar 30 is engaged with the positioninggroove 111.

By the top portion of the isolation collar 30 engaged with thepositioning portion 21 so that the inside of the isolation collar 30does not contact the cup to affect the isolation feature. When theisolation collar 30 is used to a deep cup 10, the protrusions 22reinforce the structural strength of the isolation collar 30. The insideof the isolation collar 30 contacts the protrusions 22, rather than thecup 10, so as to have better isolation feature.

While we have shown and described the embodiment in accordance with thepresent invention, it should be clear to those skilled in the art thatfurther embodiments may be made without departing from the scope of thepresent invention.

1. A paper cup assembly comprising: a paper cup with a bottom piececonnected to a lower end thereof and the cup having an open top, a lipportion made of plastic material formed along the open top, multipleprotrusions formed on an outside of the cup when forming the lipportion.
 2. The assembly as claimed in claim 1, wherein the cup having apositioning portion defined in an underside of the lip portion, anisolation collar is mounted to the cup and a top portion of theisolation collar is connected to the positioning portion.
 3. Theassembly as claimed in claim 2, wherein a lower portion of the isolationcollar is fixed to the outside of the cup.
 4. The assembly as claimed inclaim 1, wherein the lip portion is made by way of injection molding. 5.The assembly as claimed in claim 1, wherein the lip portion is made bybio-degradable plastic material.
 6. The assembly as claimed in claim 1,wherein the lip portion is made by bio plastic.
 7. The assembly asclaimed in claim 1, wherein a lower portion of the isolation collar isfolded inward so as to be fixed to the outside of the cup.
 8. Theassembly as claimed in claim 1, wherein the bottom piece is made byplastic material and is integrally formed with the cup by way ofinjection molding, the bottom piece has a positioning groove and thelower portion of the isolation collar is engaged with the positioninggroove.
 9. The assembly as claimed in claim 8, wherein the bottom pieceis made by bio-degradable plastic material.
 10. The assembly as claimedin claim 9, wherein the bottom piece is made by bio plastic.